which class returns the logging method when inheriting multiple classes python

Question

Suppose we have 3 classes, 2 parent and 1 child that inherits from both parents:

import logging
class A:
    def __init__(self):
        self.parent_logger = logging.getLogger("parent")
        
class B:
    def __init__(self):
        self.parent_logger = logging.getLogger("parent")
        
class C(A, B):
    def __init__(self):
        A.__init__(self)
        B.__init__(self)
        
test_class = C()
test_class.parent_logger.info("sample")

Which class does the parent_logger get used from when instantiating class C and calling parent logger on it?

Filip Müller · Accepted Answer · 2022-07-22 21:47:18Z

1

The order is left to right, so in this case the logger gets used from class A, because you declared C as inheriting from (A, B). First A is searched for the logger, then all its parent classes (if it has any) and then B. If you defined C as class C(B, A): then B would be searched first and the logger from B would be used.

https://www.educative.io/answers/what-is-mro-in-python

answered Jul 22, 2022 at 21:47

Filip Müller

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